<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <el-row :gutter="20">
        <el-col :span="8">
          <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getGoodsList">
            <el-button slot="append" icon="el-icon-search" @click="getGoodsList"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary" @click="goAddPage">添加商品</el-button>
        </el-col>
      </el-row>
      <!-- table 表格区 -->
      <el-table :data="goodList" border stripe>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="商品名称" prop="goods_name"></el-table-column>
        <el-table-column label="商品价格(元)" prop="goods_price" width="95px"></el-table-column>
        <el-table-column label="商品重量" prop="goods_weight" width="95px"></el-table-column>
        <el-table-column label="创建时间" prop="add_time" width="150px">
          <template slot-scope="scope">{{scope.row.add_time|dateFormat}}</template>
        </el-table-column>
        <el-table-column width="130px">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini"></el-button>
            <el-button
              type="danger"
              icon="el-icon-delete"
              size="mini"
              @click="removeById(scope.row.goods_id)"
            ></el-button>
          </template>
        </el-table-column>
      </el-table>
      <!-- 分页区 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[5, 10, 15,20 ]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="this.total"
        background
      ></el-pagination>
    </el-card>
  </div>
</template>

<script>
export default {
  data() {
    return {
      goodList: [],
      total: 0, // 总数据条数
      // 查询参数
      queryInfo: {
        query: "", // 查询关键字
        pagenum: 1,
        pagesize: 10
      }
    };
  },
  created() {
    this.getGoodsList();
  },
  methods: {
    // 根据分页获取对应的商品列表
    async getGoodsList() {
      const { data: res } = await this.$http.get("goods", {
        params: this.queryInfo
      });
      if (res.meta.status !== 200) {
        return this.message.error("获取商品数据失败");
      }
      this.$message.success("获取商品数据成功");
      this.total = res.data.total;
      this.goodList = res.data.goods;
    },

    // 分页区展示对应部分
    handleSizeChange(newsize) {
      this.queryInfo.pagesize = newsize;
      this.getGoodsList();
    },
    handleCurrentChange(newpage) {
      this.queryInfo.pagenum = newpage;
      this.getGoodsList();
    },

    // 删除商品
    async removeById(id) {
      // 弹框询问
      const confirmResult = await this.$confirm(
        "此操作将永久删除该商品,是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancleButtonText: "取消",
          type: "warning"
        }
      ).catch(err => err);
      // 用户选择情况返回 2 种结果
      if (confirmResult !== "confirm") {
        this.$message.info("取消成功");
      } else {
        const { data: res } = await this.$http.delete("goods/" + id);
        if (res.meta.status !== 200) {
          return this.$message.error("删除商品失败");
        }
        this.$message.success("删除商品成功");
        this.getGoodsList();
      }
    },

    // 跳转到添加商品页面
    goAddPage() {
      this.$router.push("/goods/add");
    }
  }
};
</script>

<style lang="less" scoped>
</style>